It seems to be less about just accepting the community is awful, but more of "It's the internet" excuse that we've probably all heard in our time. The receiving end is to blame for reacting, not the person dishing out the insults and acting immaturely.
I see this excuse so often, and it's just unfair to everyone else. Same with the whole, "Just mute them," which mind you I do. At the same time, it does not excuse them of their behavior. I shouldn't have to use the mute button just to play normally. It's like saying someone screaming in a library is allowed to scream because I can always put on headphones or something to drown out the noise.